Add an action to retrieve un simple summary with

the total of jumps and the last jump

Back/skydiveLogs-api.Model/SimpleSummary.cs

@@ -0,0 +1,11 @@
+namespace skydiveLogs_api.Model
+{
+    public class SimpleSummary
+    {
+        public int TotalJumps { get; set; }
+
+        public int TotalCutaway { get; set; }
+
+        public Jump LastJump { get; set; }
+    }
+}